Largest IPO by market cap in 2026?

What you need to know

This market is asking: which company will go public in 2026 and be worth the most money on its very first day of stock trading? An IPO — Initial Public Offering — is when a private company sells shares to the public for the first time. The winner here is whichever company has the biggest total value (share price × all shares) at the close of its first trading day. Right now the market is overwhelmingly focused on SpaceX, Elon Musk's rocket and satellite company. The market settles on whichever company among those listed completes an IPO in 2026 and has the highest market capitalization at the official closing price on its first trading day — no later than December 31, 2026. There are two important edge cases worth knowing: if a company gets acquired by or merged into an already-public company before it can IPO, it is immediately ruled out. And if trading is interrupted on a company's first day, the official closing price of that shortened session still counts. The news provided is mostly about SpaceX's IPO generating conversation — Wall Street analysts are apparently debating whether SpaceX changes the composition of famous tech-stock groupings, and prominent investors are describing a SpaceX IPO as a significant moment for markets. The other headlines appear unrelated to this question. No confirmed IPO date or pricing has been reported in the provided news. The market prices SpaceX at 91%, so the main question is really just whether SpaceX actually goes public in 2026 at all — not whether it would win if it did. SpaceX has been privately held for decades, and Elon Musk has historically been resistant to taking it public. Plans can change, deals can fall through, or regulators could create delays. Anthropic and OpenAI are also still private and face their own IPO hurdles. The whole market hinges on whether these companies actually follow through on going public within the year.

The odds right now

• SpaceX+4.0 pts (1w)88%
• Anthropic-3.4 pts (1w)9%
• OpenAI-1.6 pts (1w)2%
• Discord+0.1 pts (1w)0%
• ByteDance0%
• Stripe0%
• Kraken0%
• SHEIN0%
• Waymo0%
• Revolut0%
• Perplexity AI0%
• Databricks0%

Price history

How this resolves

Resolves December 31, 2026

This market will resolve to the company that achieves the highest market capitalization in U.S. dollars based on the official closing price on its first trading day in 2026. This market will resolve to a company that completes an Initial Public Offering (IPO) between January 1 and December 31, 2026, 11:59 PM ET. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. If two or more companies have exactly equal highest closing market capitalizations, this market will resolve to the company whose listed name comes first alphabetically. Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used. In case the respective company's primary exchange’s official listing page does not report in U.S. dollars, it will be converted to U.S. dollars using the U.S. Federal Reserve Board’s H.10 foreign exchange reference rate for the relevant currency pair on the company’s first trading day (https://www.federalreserve.gov/releases/h10/). If no such rate is available for the relevant trading day, the most recent previously published rate will be used. If the relevant currency is not listed, another credible exchange rate source will be used. A listed company may resolve to "No" as soon as it becomes unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded. In the event of an interruption in the course of the normal trading session on the respective companies’ first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that as the first day of trading for purposes of this market.

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